HyperDic: extremely_low_frequency

English > 1 sense of the expression extremely low frequency:
NOUNattributeextremely low frequency, ELFbelow 3 kilohertz
English > extremely low frequency: 1 sense > noun 1, attribute
MeaningBelow 3 kilohertz.
SynonymELF
Part ofelectromagnetic spectrumThe entire frequency range of electromagnetic waves
Broaderradio frequencyAn electromagnetic wave frequency between audio and infrared

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